304 



Mr. S. and Dr. L. F. Hirst on 



In the British Museum collection there is a large distended 

 female tick from the Lake of Chalco, near Mexico, which 

 lias been determined by Prof. Neumann as Amblyomma 

 pilosum, Nn. (originally described from the Galapagos). It 

 differs from the female of A. bouhngeri in having the scutum 

 triangular in shape and much rougher, the punctures being 

 larger and closer together. Moreover, the stigmata are some- 

 what different in shape. 



Amblyomma nitidum, sp. n. 



£ . — Scutum longer than broad and oval in shape ; its 

 surface smooth, shining, and furnished with numerous very 

 minute punctures, those which are placed near to the lateral 

 margins being a little larger than those in the middle. 

 Cervical grooves normal in appearance, the superficial poste- 

 rior part short. Postero-median groove represented by a 

 faint dark line. Postero-lateral grooves present, but ill- 

 defined. Marginal grooves represented by very ill-defined 

 and superficial depressions, which come to an end in front of 

 the anteriormost festoon. Eyes minute and almost invisible 

 (fig. 5). 



Fin". 6. 



Fi<r. 5. 



Fig. 5. — Amhh/omma nitidum, 3 . Dorsal view, X 9. 

 Fi g- 6 -— » $• „ „ X8. 



Ventral surface much furrowed and pitted, especially poste- 

 riorly. Stigmata very broad and roughly triangular in shape. 



Rostrum of moderate length, the base finely punctured 

 above. Hypostome armed with four files of teeth ou each 

 side. 



